seat post
How to Adjust your Bike’s Geometry/Seat Height/Stem Length
Most people who start biking don’t realize that bikes come in different sizes. However, if you have a tall person and a short person get on the same bike, the difference can be clearly seen. Either one can’t touch the pedals or the other will never be able to extend their legs.
The rule of thumb is to take a bike and stand over it, feet flat on the ground. It’ll be too big if your crotch can’t clear the top bar. It’ll be too small if the top bar is more than 2 inches below you. Now that you have a suitable bike for your height, you can make the following adjustments.
Seat height is really important because you can hurt yourself on your rides through improper forcing of your legs. It is an adjustment that all triathletes are familiar with because it can make or break your competition.
Parts of a Bicycle
This is an early episode where Jim goes through parts of the bicycle. Jim starts with the front wheel, rim, tire, tube, spokes and hub, then moves on to the fork and brake and brake calipers.
Next he checks out the handlebars, brake levers, and bar tape. On to the stem, and headset which transitions into the frame, which consists of the headtube, top tube, down tube, seat tube, chain stay and seat stay.
Which brings us to the seatpost and saddle. Moving on to the drivetrain made up of the crank, chain, cassette, rear derailleur and front derailleur. What allows the crank to turn is the bottom bracket and that's pretty much what we're working with. See you on the road, bitches!
Joe's much less suave, and much more annoying rendition of "Part's of a Bicycle":
